No exploitation reportedFix available

CVE-2020-3901

Q: Is CVE-2020-3901 actively exploited?

Active exploitation of CVE-2020-3901 has not been confirmed. Its EPSS score was 1.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-3901?

CVE-2020-3901 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2020-04-01
Fixed in10.9.3
WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 13.4 and iPadOS 13.4, tvOS 13.4, watchOS 6.2, Safari 13.1, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Processing maliciously crafted web content may lead to arbitrary code execution.

Timeline

dates in UTC

2020-04-0118:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-3901?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-3901?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple icloud

Branch	Affected	Fixed in	Source
10.9	< 10.9.3	10.9.3	NVD

Apple ipad os

Branch	Affected	Fixed in	Source
13.4	< 13.4	13.4	NVD

Apple iphone os

Branch	Affected	Fixed in	Source
13.4	< 13.4	13.4	NVD

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

dleyna-rendererAlmaLinux:8all versions · fixed in 0.6.0-3.el8
frei0r-pluginsAlmaLinux:8all versions · fixed in 1.6.1-7.el8and 2 other packages
gnome-remote-desktopAlmaLinux:8all versions · fixed in 0.1.8-3.el8
gtk-docAlmaLinux:8all versions · fixed in 1.28-2.el8
gvfsAlmaLinux:8all versions · fixed in 1.36.2-10.el8
LibRaw-develAlmaLinux:8all versions · fixed in 0.19.5-2.el8
libsoupAlmaLinux:8all versions · fixed in 2.62.3-2.el8and 1 other package
mutter-develAlmaLinux:8all versions · fixed in 3.32.2-48.el8

10 more package ranges on OSV.dev

Full record on NVD

Fix

Update Apple icloud to 10.9.3

Advisories and patches

support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-843read 2026-10-23
FIRST EPSSEPSS score1.9 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2020-04-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-3901?

Is CVE-2020-3901 actively exploited?

Active exploitation of CVE-2020-3901 has not been confirmed. Its EPSS score was 1.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-3901?

CVE-2020-3901 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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